{
  "$schema": "https://foodadditiveindex.com/api/v1/schema.json",
  "id": "https://foodadditiveindex.com/additives/calcium-oxide",
  "slug": "calcium-oxide",
  "name": "Calcium oxide",
  "identifiers": {
    "e_number": "E529",
    "ins_number": "529",
    "cas_number": "1305-78-8",
    "inchikey": "ODINCKMPIJJUCX-UHFFFAOYSA-N",
    "pubchem_cid": 14778
  },
  "functional_class": "Acidity regulator",
  "summary": "Calcium oxide, or quicklime, is an alkaline acidity regulator and processing aid used in sugar refining, maize processing and dairy.",
  "derivation_summary": "Produced by heating limestone to drive off carbon dioxide. It reacts vigorously with water to form calcium hydroxide.",
  "regulatory_status": [
    {
      "jurisdiction": "US",
      "jurisdiction_name": "United States",
      "authority": "Food and Drug Administration",
      "status": "permitted",
      "status_label": "Permitted",
      "provision_count": 1,
      "provisions": [
        {
          "status": "permitted",
          "food_category": null,
          "max_level": null,
          "max_level_unit": null,
          "conditions": null,
          "effective_from": null,
          "citation": {
            "ref": "21 CFR 184.1210",
            "url": "https://www.ecfr.gov/current/title-21/section-184.1210"
          },
          "source": "ecfr",
          "retrieved_at": "2026-09-07T18:25:51.549Z"
        }
      ]
    },
    {
      "jurisdiction": "CODEX",
      "jurisdiction_name": "Codex Alimentarius",
      "authority": "Codex Alimentarius Commission / JECFA",
      "status": "permitted_with_conditions",
      "status_label": "Permitted, with conditions",
      "provision_count": 2,
      "provisions": [
        {
          "status": "permitted",
          "food_category": null,
          "max_level": null,
          "max_level_unit": "GMP",
          "conditions": null,
          "effective_from": "1999",
          "citation": {
            "ref": "CXS 192-1995 Table Three, INS 529",
            "url": "https://www.fao.org/fao-who-codexalimentarius/codex-texts/dbs/gsfa/en/"
          },
          "source": "gsfa",
          "retrieved_at": "2026-09-07T07:54:15.059Z"
        },
        {
          "status": "permitted_with_conditions",
          "food_category": {
            "system": "codex",
            "code": "01.2.1.2",
            "name": "Fermented milks (plain), heat-treated after fermentation"
          },
          "max_level": null,
          "max_level_unit": "GMP",
          "conditions": null,
          "effective_from": "2013",
          "citation": {
            "ref": "CXS 192-1995 Table One, INS 529, food category 01.2.1.2",
            "url": "https://www.fao.org/fao-who-codexalimentarius/codex-texts/dbs/gsfa/en/"
          },
          "source": "gsfa",
          "retrieved_at": "2026-09-07T07:54:15.059Z"
        }
      ]
    }
  ],
  "names": [
    {
      "name": "1305-78-8",
      "type": "cas",
      "source": "ecfr"
    },
    {
      "name": "Aetzkalk",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Airlock",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "BDFERM BIOSPRAY",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Bell CML(E)",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Bell CML(P)",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Branntkalk",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Burned lime",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Burnt lime",
      "type": "common",
      "source": "openfoodtox"
    },
    {
      "name": "C7X2M0VVNH",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Calcia",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Calcia (CaO)",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Calcium monoxide",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Calcium oxide",
      "type": "common",
      "source": "openfoodtox"
    },
    {
      "name": "Calcium oxide (CaO)",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Calcium oxide (JP17)",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Calcium oxide, 99.995% trace metals basis",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Calcium oxide, CP",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Calcium oxide, p.a., 95.0%",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Calcium oxide, SAJ first grade, >=98.0%",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Calcium oxide, SAJ special grade, >=98.0%",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Calcium oxide, Vetec(TM) reagent grade",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Caloxal CPA",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Caloxol CP2",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "CALOXOL W 3",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Caloxol W3",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "CALX",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Calx usta",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Calxyl",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Caswell No. 147A",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "CCRIS 7496",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Chaux vive",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "CML 21",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "CML 31",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "CML 35",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Desical P",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "E 529",
      "type": "common",
      "source": "openfoodtox"
    },
    {
      "name": "EPA Pesticide Chemical Code 075604",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "EVECODE ECO FRIENDLY MULTI SANITIZERspray",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "EVECODE Eco-Friendly Safe SanitizerSpray",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Gebrannter kalk",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "heavy calcium oxide",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "HSDB 1615",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "INS NO.529",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "INS-529",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Kalziumoxid",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Lime (Calcium Oxide)",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Lime (cao)",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Lime (USP)",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Lime [USP]",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Lime, burned",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Lime, meets USP testing specifications",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "oxocalcium",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Oxyde de calcium",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Pebble lime",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Quick lime",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Quicklime",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Rhenosorb C",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Rhenosorb F",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Unslaked lime",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Vesta PP",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Wapniowy tlenek",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "E529",
      "type": "e_number",
      "source": "openfoodtox"
    },
    {
      "name": "529",
      "type": "ins",
      "source": "gsfa"
    },
    {
      "name": "calcium oxide",
      "type": "iupac",
      "source": "openfoodtox"
    },
    {
      "name": "Calcium oxide",
      "type": "label",
      "source": "ecfr"
    }
  ],
  "hazard_reference_values": [],
  "sources": [
    {
      "key": "ecfr",
      "name": "Electronic Code of Federal Regulations, Title 21",
      "publisher": "U.S. Government Publishing Office / National Archives",
      "licence": "Public domain",
      "url": "https://www.ecfr.gov/api/versioner/v1/full/2026-08-31/title-21.xml",
      "retrieved_at": "2026-09-07T18:25:51.549Z"
    },
    {
      "key": "gsfa",
      "name": "Codex General Standard for Food Additives (CXS 192-1995)",
      "publisher": "Codex Alimentarius Commission (FAO/WHO)",
      "licence": "FAO terms — non-commercial use with attribution",
      "url": "https://www.fao.org/fao-who-codexalimentarius/codex-texts/dbs/gsfa/en/",
      "retrieved_at": "2026-09-07T07:54:15.059Z"
    }
  ],
  "citation_policy": "Cite as: Food Additive Index, \"Calcium oxide\", https://foodadditiveindex.com/additives/calcium-oxide. This site reports regulatory status and does not rate additives.",
  "generated_at": "2026-09-08T00:09:38.453Z"
}